Sökning: "LDMOS"

Visar resultat 1 - 5 av 8 uppsatser innehållade ordet LDMOS.

  1. 1. 1kW Class-E solid state power amplifier for cyclotron RF-source

    Master-uppsats, Uppsala universitet/FREIA

    Författare :Stefan Book; [2018]
    Nyckelord :Class-E; LDMOS; high efficiency; high power; VHF; power amplifier; accelerator; cyclotron;

    Sammanfattning : This thesis discusses the design, construction and testing of a highefficiency, 100 MHz, 1 kW, Class-E solid state power amplifier. The design was performed with the aid of computer simulations using electronic design software (ADS). The amplifier was constructed around Ampleon's BLF188XR LDMOS transistor in a single ended design. LÄS MER

  3. 2. RF High Power Amplifiers for FREIA – ESS : design, fabrication and measurements

    Master-uppsats, Uppsala universitet/Institutionen för fysik och astronomi

    Författare :Linus Haapala; Aleksander Eriksson; [2014]
    Nyckelord :RF power amplifier; ESS; 352 MHz;

    Sammanfattning : The FREIA laboratory is a Facility for REsearch Instrumentation and Acceleratior development at Uppsala University, Sweden, constructed recently to test and develop superconducting accelerating cavities and their high power RF sources. FREIA's activity target initially the European Spallation Source (ESS) requirements for testing spoke cavities and RF power stations, typically 400 kW per cavity. LÄS MER

  4. 3. Development of a wideband high power amplifier for cancer treatment.

    Master-uppsats, Avdelningen för elektronik, matematik och naturvetenskap

    Författare :Sohil Shahabi Ghahfarokhi; [2013]
    Nyckelord :wideband; high power; amplifier; hyperthermia;

    Sammanfattning : Medical hyperthermia refers to heating of tumors to temperature levels which are lethal to the cells for sufficient periods of time or rendering the cancerous cells more sensitive to ionizing radiation or chemotherapy. In order to increase the temperature in cancerous tissues, high power solid state microwave amplifiers need to be used. LÄS MER

  5. 4. A Study of Different Switched Mode Power Amplifiers for the Burst Mode Operation

    Master-uppsats, Institutionen för teknik och byggd miljö

    Författare :Dristy Rahul Parveg; [2008]
    Nyckelord :High Efficient transmitter for 3G base station application; Burst mode operation; Switched mode power amplifier SMPA ;

    Sammanfattning : Power-amplifier efficiency is a significant issue for the overall efficiency of most wireless system. Therefore, currently there are different kind of Switched mode power amplifiers are developed which are showing very high efficiency also at higher frequencies but all of these amplifiers are subjected to drive with the constant envelope signals. LÄS MER

  7. 5. Current Distribution in High RF Power Transistors

    Magister-uppsats, Ämnesavdelningen för elektronik

    Författare :Jihad EL-Rashid; Youssef Tawk; [2007]
    Nyckelord :Current Distribution in High RF Power Transistors;

    Sammanfattning : To obtain the power levels required from high RF power transistors, the size of the chip has often to be made so large that inductance of electrical connections inside the package cannot be neglected. This may have the effect that various parts of the transistor chip are not connected exactly parallel, i.e. LÄS MER